Reversed-flow water-cooled engine



June 3, 1930. E. o. scHJoLlN REVERSED FLOW WATER COOLED ENGINE FiledFeb. 18, 1928 Patented Junev 3,V 1930 yUNnrEnf s'rArs PATENT OFFICE,"

RIC OLLE SCHJ'OLIN, 0F BIRMINGHAM, MICHIGAN, ASSIGNOR TO YELLOW TRUCK &COACH MANUFACTURING COMPANY, 0F PONTIAC, MICHIGAN, A CORPORATION OF i fMAINE 'REVERSED-FLOW WATER-COOLED' ENGINE .Application filed February18j, 1928. Serial No. 255,409.

, This invention relates to a cooling system v for an internalcombustion engine and has to vdo particularly with the cooling system ofan internal combustion engine of an automotive vehicle.

It is'an object of the invention to provide an improved circulatingsystem for the cooling medium or" an internal combustion engine. Morespecifically, it is an object of the invention to provide a coolingsystem which will provide a more even distribution of heat in theregionof the cylinder heads.

lOther objects and advantages of the invention will appear in thecoursel of the following description, taken in connection with theaccompanying drawing and appended claims.

In the drawing: .Figure 1 is a side kelevation of a conventionalinternal combustionV engine embodying my invention. i

` Figure 2 is a front view with parts broken away. l j Referring to thedrawing, I have illustrated in V,Figure 1 a conventional internalcombustion engine including. a. cylinder block 10, waterv cover 12 andradiator 14. A water pump 16 is-provided on the side of the engineand isdriven inthe usual manner from the crankshaft and is connected by meansof an inlet pipe 18 with' thev lower part of the radiator andl byV anoutlet pipe 2O with the water'cover'12. A pipe 22 extending fromy thelower part of thewater jacket of the cylinder block to the upper ,partof the radiator completes the circuit. Extendingl between the top of thewater cover 12 and the top of the radiator 1 4fis a small pipe 24. Thispipe is j necessary to eliminate 4the possibility of the formation -ofan air pocket in the top of the water cover 12 and may be quite small, athreeeeighths copper pipe being found to give good results. This pipe isso small that itsk yinterference with the normal flow of cooling liquidis negligible. Y

Thestructure described provides a more even distribution of heat in thecylinder block and thereby eliminates uneven expansion.

vThis type of cooling system isfparticularlyy adapted for use with asleeve valve engine, as illustrated, since this type of engine presentsdiiiiculties in the way of cooling. Forcing the water in at the topcools the junk heads and spark plugs efficiently and renders feasible ahigher compression without any detrimental eii'ects.

I claim:

1. VIn a circulatory cooling system for inter-nal combustion engines formotor vehicles and the like, a main circuit including a heat radiatingunit having an inlet and an outlet,

`a jacketedv engine cylinder head connected with the outlet of the heatradiating unit, a j acketed engine cylinder block connected with theinlet of the heat radiating unit, and an auxiliary circuit comprising aby-pass around the jacketed head and block and connecting the jacketedhead and the inlet of the heat radiating unit.

2. The structure of claim 1 and apump for forcing cooling medium thruboth the main circuit and the auxiliary circuit.

r3. In a circulating cooling system for internal combustion engines formotorvehicles and .the like, av closed circuit for cooling mediumincluding a radiator having an inlet and an outlet, a jacketed enginecylinder block having an outlet connected with the radiatory inlet, anda jacketed engine cylinder head having an inlet connected with theradiator outlet.

4f. In combination a heat radiating unit having an inlet and outlet, awater jacketed engine comprising a cylinder blockv and a removable headaffording a combustion chamjacket and the inlet to the radiating unit,and

a pump for withdrawing cold water from the ico Y rdiatinguntfoutlet anddelivering if under In testimony; Wheireof I 'aff-1X .my `Signariure.

ERIC oLLE sCHJoLrN.

